Device for indicating the density of liquids



L P, PARKHURST AND Ri 0. NEM; DEVICE Foa INDICATINGTHE DENSHY 0F mums,

APPLICATION FiLED JULY 26, |919.

lm, www @$0.15, 1921.,

ZZ i Z' /Illllllllllnll" 2z um float-bod which is TED P T E IVAN P. PARKHURST AND ROY 0. NEAL, 0F KXNSLEY, ANSA.

DEVICE FOR INDICATING THE DENSITY @F LIQUIDS.

naeasea.

To all whom it may comer/n:

Be it known that we, IVAN P. PARKHURST and Bor O. NEAL, citizens of the United dicating and preferably recordingcontin-- uously the density of liquids. j

An important object of the invention is to provide a device of the v above-mentioned character which is accurate and-automatic in operation, and of simple construction.

Other objects and advantages of the in.

vention will be apparent during the'course of the following description.

In the accompanying drawingsformin a part of this specification, and in whlch like numerals are employed t0 designate like parts throughout the' same:

embodying in section;

Fig. 2 is a s' -`ilar view ofthe operating parts, the U-tube being shown in section; j

Fig. 3 is a perspective view of the lpen lever; and,y Fig. l is a detail view, parts in section of a contact connection.-

lin the drawings, `wherein for the purpose of illustration is shown a preferred embodiment of our invention, the numeral 5 desi nates a'vertical receptacle, through whic our invention, parts being shown the liquid, the density of which is to be recorde is continuouslypassed. The liquid is 'introduced into the lower end of the receptacle through a pipe 6, equipped with a valve 7 to control the supply. The liquid passes from the upper end of the receptacle 5 through a plpe 8. l

Arrangedwithin the lower portion of the receptacle 5, and held stationary therein by any suitable means, is a U-tube 9, having a uniform bore. This tube is adapted Afor .the I reception of a liquid having. a heavy specific gravity, such as mercury.'I f The numeral 10 designates a submerged referably in the formA of a ho low shell lled vwith air. oat-body is submerged in the liquid within the tank 5 and is buoyed up by the same. Arranged beneath the oat body-'10 is a Specication of Letters Patent.

Application led July 26,

This

rammed rea. i5, 192i.

1913. Serial No. 313,647.

.weight 11 connected therewith by an ele# ment 12, and this weight serves as a stabilizer for the oat body 11. Connected with the weight l1 is a depending plunger-rod 13 formed of a material which will not be acted upon by the liquid or mercury in the U-tube or by the liquid within the receptacle 5. This plunger rod is slidablewithin one arm of the U-tube, the diameter of the Vbore-of` the lll-tube 9 being larger than the diameter of the plun er-rod 13.

'Connecte with the upper end of the outer arm of the U-tube 9 is a tubular coil 14C, held stationary by any'suitable means, such as straps 15', attached to the tank or receptacle 5. This tubular coil has its upper end closed and the coil is illed with an expansible liquid, such as toluene. rlhe volume of the liquid in the coil will depend upon the cubical coeiiicient of expansion of the toluene or other liquid within the coil and of the coeflicient of expansion of the liquid within the U tube. Figure l is a side elevation of apparatus .j 16. This rod or nee le lcontacts within a conical recess formed in a headv 17 carried by an adjustable rod 18. This adjustable rod is screw threaded to engage within a screv7V threaded opening formed 1n a bracket 19, the rod being provided at its upper end with a milled head 20 by means of which it may be,conveniently` turned. The bracket 19` 1s swiveled upon a second adjustable rod 21,- ihaving screw threaded engagement within a bracket 22, carried by a pen-lever 23, iivoted at 24. The rod 21 carries a milled head 24 b means of which it`may be turned. The ever 23 is provided atits free end with a pen 25, adapted to record or markupon a rotatable recording sheet 26, advanced by any well known or preferred mechanism.

The density of the V liquid continuously passing through the receptacle 5 is recorded y the movementof the pen upon the chart 26, which is driven at a suitable speed.' "The movement of the pen is effected 1n a downward direction by gravity, while it is moved 'upwardly by the rod l5 contacting with the head 17. `It is obvious that any change in the specific gravity of the `liquid passing through the ltank 5, without a change in its temperature, will eiect a vertical movement of the doatbody 10 which will actuate the recording pen. If the temperature of the li uid rises the toluene in the tube will expanqd thereby raising the level of the mercury in the other arm of the U-tube.

'Ihis elevated level of the mercur acts upon l0, due to the change of temperature of thel water in the tank 5 from the standard temperature.

It is to beunderstood that the form of our invention herewith shown and described is to be taken as the preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scopeof the subjoined claims.

Having thus described our invention, we claim:

1. In apparatus for indicating the density of liquids, a receptacle for receiving the fluid, a float body embodyinga plunger rod arranged within the receptacle, a tube receiving a heavy liquid and' having the plunger rod operating therein in contact with the heavy liquid, and a receptacle connected with the U-tube and receiving an expansible fluid said receptacle being arranged within the first mentioned receptacle.

2. In apparatus for indicating the density of liquids, a receptaclehavinginlet and outletmeans, a ioat body arranged within the receptacle, a. weight connected with the lower end of the ioat body, a plunger rod connected with the weight a tube arranged within the lower portion of the receptacle and receiving a heavy liquid 'and having the plunger rod operating therein, and a second tube connected with the first mentioned tube and receiving an expansible liquid.

3. In apparatus for indicating the density of li nids, a receptacle .for receiving the liqui a float-body arranged within the receptacle, a plungerrod connected with the iioatebody, a U-tube receiving a heavy liquid and having the plu er rod operating therein in contact with t eheavy liquid, a tube connected with the 'll-tube and receiving an expansible fluid, said tube being arranged withinthe receptacle, and indicating means actuated by the Heat-body. p l

4c. In apparatus for indicating the density oi liquids; areceptaclehaving inlet and outlet means, a Heat-body arranged within the receptacle, a weight connected with .the lower end the doat-bodya plunger rod-connected with the weight, a U-tube arranged within the lower portion of the receptacle and receiving a hea liquid and having the plunger rod operatlng therein, a tubularcoil connected with the U-tube and receiving an expansible liquid, and recordingfmechanism operated by the movement of the ioat` body. 1

v5. In apparatus for indicating the density vof liquids, a float-body, a tube having a heavy li uid therein, a plunger rod connected with the `iioat-body and having its lower end disposed within the tube and the liquid therein, and a lighter li uid arranged in a portion of said tube, lsaid ighter liquid being capable of expansion when the temperature rises.

6. In apparatus for indicating the density screw threaded engagement with the? bracket,-and a contact element carried by the lioat-body to engage the vertical rod. y

7. An apparatus for indicating the density of liquids, a receptacle, a lioat-body arranged therein, a pivoted arm carrying indicating means, a rod extending longitudinally of the armand having screw threaded engagement therewith so thatit may bead-- justed longitudinally of the arm, a bracket' carried by the' ro`d, a vertical rod having screw threaded engagement with the bracket and provided in its lower end with a conical` i recess, and a pointed contact element carried` by the float-bodyfandhaviug :its point in engagement with the conical recess formed .in said vertical rod.

^ In testimony whereof we aiiixeuiq.,signa -tures in presence of twow1tnesses.

IVAN P. PARKHURST ROY O. NEAL,

'WitlsseEszbBA J. Gr. 'llnonNnmm 

